Straightedge tool



, INVENTOR., glm@ MMW ATTORNEY w. B. PETREE STRAIGHTEDGE TOOL .FiledApril 14, 1937 Aug. 23, 1938.

Patented Aug. 23, 1938 UNHTD STTES PATENT OFFICE 27,127,617 `4 'ns'rRAIGn'rEnGE "r'ooL v William B. Peace, sanllvranciseo, Calif;Application April-14, 1937, serial No. .136,853

9 claims.v (olf. 164573)' l This invention relates to improvements instraight edge tools, and has special reference to cutting guidesparticularly designed for the use 0f paper hangers in trimming strips ofpaper.

An object of my invention is to provide ran improved straight edge toolof the character described which is of light weight and particularlydesigned to maintain its accurate and straight condition regardless ofchanges in temperature `or climate and regardless of the rough usagetowhich such tools are ordinarily subjected. Y

Other or further objects of my invention will be pointed outhereinafter, indicated in the appended claims, or obvious to one skilledin the art upon an understanding of the present disclosure. For thepurposes of this application I y have elected to show herein certainforms of a papen hangers straight edge representative of my invention;it is to be understood however that the embodiments of my invention=herein shown and described are for purposes of illustration only, andthat therefore they are not' to be regarded as exhaustive yof thevariations'y of the invention, nor are they to be given anyinterpretation such as might have the effect of limiting the claimsshort of the true and-most comprehensive scope of the invention intheart In the accompanying drawing: H

Fig. 1 is a fragmentary perspectivesectional View of a straight edgetool embodying what I consider the preferred embodiment of my invention;

i Figs. 2, 3, 4, 5 and 6 are similar views showing modified forms of myinvention.

Referring to the drawing and particularly to Fig. 1, the numeral Idesignates an elongated body, substantially I-shaped in cross sectionand made preferably from a suitable light weight metal possessed ofconsiderable strength and rigidity. Oppositely disposed lateral anges 2forming a part of the body I are disposed at true right angles withrespect to said body.

Filters 3 and 4, of wood or other suitable light weight material aretted within the channels formed at the opposite sides of the body Ibetween the flanges 2.

Fitting over the flanges 2 of the elongated body I are metal facingmembers 5 and 6 having inwardly protruding flanges 5' and 6',respectively, which firmly engage with the fillers 3 and Il and therebymaintain them in fixed positions with respect to the said body member.The facing members 5 and 5 being in firm engagement with the flanges 2throughout their lengths, are normally maintained in fixed positionswith respect suitablemeans Amay be employed to prevent the shiftingofthe said facing members upon the flanges.v It will be seenfthat thevarious parts comprisingthestraightedge tool may be read-y ily-assembledbyrst placing the llers 3 and 4 within the'channels formed at theopposite sides of the body I, and then slipping the facing membersinplace upon the flanges 2. The facing members '5 and 6 are eachsubstantially block C-shaped in cross-section with the longitudinalopening therethrough being of sufficient size to accommodate thelateral'flanges 2 of the body I. The upper sides of the facing members 5and 6 lie in a common plane, while their lower sides also lie ina commonplane whichvis preferably parallel to thefrst mentioned plane. Theoutwardly disposed sides of the facing members 5 and 6 are each disposedat right angles to its upper and lower sides. The metal of each ofthesaid facing members at the exposed right angle corners where thevertical side joins the horizontal sides is smooth and straight, therebypresenting a true and accurate guide for a cutter. The upper side of thevfacing member 5 extends inwardly throughout its length to provide -astraight track or guide 'Iv for maintaining a paper cutting tool of thekind now commonly used by paper hangers, in its proper operatingposition. The lower sides of the facing members 5 and 6offer'considerable resistance to movement over a supportingsurface,thereby-facilitating the holding of the tool inf a desired position. Thelateral flanges 2 of the elongated body I give the latter considerablerigidity, and serve as suitable means for mounting the facing members 5and 6. The lateral anges 2 not only give the desired rigidity to thebody I but they provide suitable channels on opposite sides of the saidbody for the mounting and maintenance of the filters 3 and 4.

The embodiment of my invention shown in Fig. 2 is the same as that shownin Fig. 1, except that the guide or track 'I extending from the upperside of the facing member 5 is eliminated.

In the modified form of my invention shown in Fig. 3 an elongated metalbody Ia is formed at its lateral side edges with right angle flanges 2aand with outwardly curved longitudinally disposed re-enforcing members8. The re-enforcing members are joined to the lower flanges 2 and to thebody member Ial near the latters side edges, thereby providing a sturdyand rigid construction adapted to adequately brace the said anges andthe body member. Fitting over the flanges 2a are facing members 5a and6a of the to thelbody member I, or if so desired any other kindpreviously described. The facing member a is provided with alongitudinally disposed track or guide 'la at its upper side formaintaining a paper cutting tool in its proper operating position.

The embodiment of my invention shown in Fig. 4 is the same as that shownin Fig. 3 except that the track or guide la extending from the upperside of the facing member 5a is eliminated.

In the modied form of my invention shown in Fig. 5 an elongated metalbody Ib is formedat its lateral side edges with right angle flanges 2band with upwardly and downwardly disposed projections 9 which extendlongitudinally in parallel relation to the said flanges. Thelongitudinally disposed projections are separated by a suitable grooveWithin which the inwardly disposed flanges 5 and 6 of facing members 5band 6b are adapted to fit. The longitudinally disposed projections haveinwardly disposed flanges 9 which form suitable means for maintainingfillers 3b and 4b in place .against the upper and vlower surfaces of themetal body Ib. The facing members-5b and 6b are of the kind previouslydescribed and the former is `provided with a longitudinally disposedtrack o-r guide .1b at its upper side for maintaining a paper Ycuttingtool. in its proper operating position. The filler 4b is preferably cutaway at points opposite the track 'I so as to permit the convenient useof the'cutting tool in the manner intended.

The embodiment of my invention shownl in Fig. 6 is the same asthat-shown `in Fig. .5 except that the track or guide 1b extending fromthe upper side of the facing member 'I-b is eliminated.

In the various modified embodiments of `my invention the metal body isconstructed from a suitable light weight material possessed ofconsiderable strength and rigidity. In the forms wherein the fillers areused `thel meta-l body is substantially encased byfthe facing membersand the said fillers, thereby lproviding a structure wherein the bodymember is insulated and is not likely to be affected `or :distorted .bychanges in the temperature of the surrounding air.

Having described my invention what I lclaim is.:

l. A straight edge tool comprising an. elongated bodymembersubstantially I-shapedin crossnsection having a .central portion andlateralanges, and a filler positioned onat least one :side1of the body,`and facing members fitting-on `theflanges.

2. A straight edge tool comprising an elongated body membersubstantially I-shaped in cross section and longitudinally disposedfacing members fitting over the lateral edges of the body member.

3. A straight edge tool comprising an elongated body membersubstantially I-shaped in cross section having a central portion andlaterally disposed flanged portions, and facing members lltting over theflanges, the said facing members being substantially block C-shaped incross section.

4. A straight edge tool comprising an elongated bodymember substantiallyI-shaped in cross section, longitudinally disposed facing members ttingover the lateral edges of the body member, and an inwardly disposedflange on one of the .facing members for guiding a cutting tool.

5. A straight edge tool comprising an elongated body membersubstantially I-shaped in cross section, longitudinally disposed facingmembers tting over the lateral edges of the body member, and fillerslocated on opposite sides of the body member.

6. A straight edge tool comprising yan elongated body membersubstantially I-shaped in cross section having a central portion andlateral flanges,

.a longitudinally disposed filler on at least one side ofthe bodymember, and longitudinally disposed facing members fitting over theflanges and in -engagement with the nller.

7. A straight edge tool comprising an elongated .body member, lateralflanges formed on the body member, enlarged re-enforcing portions at oneside which are joined to certain of the flanges and to lthe Asaid bodymember, `and facing members fitting over the flanges.

8. A straight edge tool comprising an elongated rbody member, lateralflanges formed on the body member, enlarged re-enforcing portions formedat the vjuncture of certain of the flanges and the body member, facingmembers tting over the flanges, and an inwardly disposed flange on one.of the facing -members for guiding a cutting tool.

9. A straight edge tool comprising an elongated body member, lateralflanges formed on the body member, protruding members formed on the bodymember in parallel relation to but separated from the flanges, fillerspositioned on the opposite faces of the body member between theprotruding members, flanges on the protruding members for holding thefillers against the body member, and facing `members fitting on thelateral flanges of the body member.

WILLIAM B. PETREE.

